Ok.. Don't want to see a doctor because this seems a silly symptom, but am concerned and hopeful somone might have a suggestion. I have been experiencing temporary loss of muscle strength in my arms. It lasts maybe a minute or two. I am always sitting or laying down when it strikes and it is like a rush through my upper muscular system. I feel it coming on and I just rest my arms down and wait for it to pass. It is also slightly painful as it rushes through my arms. I have never heard of anyone having anything like this, so I can't bring myself to see anyone about it. I am certain though it's not a creation of my imagination. I am also a stage iii breast cancer survivor of 4 years and have been somewhat wondering if this might somehow be a result of my treatments or the disease itself? Am I crazy or might this really be a sign to something. The only other way I can think to describe the sensation is to compare it to how one can feel after lifting something extremely heavy and just feeling total weakness in the used muscles. Only difference is mine passes very quickly. I would really really appreciate any assistance.